Russian President Vladimir Putin has sent a message of condolence to US President Barack Obama after two explosions at the Boston Marathon.

He strongly condemned the explosions and offered assistance in the investigation into what he called a “barbaric crime”.

Putin said that only joint and coordinated actions against terrorists will yield results.

“Putin strongly condemned this barbarous crime and expressed his conviction that the fight against terrorism requires the active coordination of efforts by the global community,” the official statement said.

Mikhail Margelov, chairman of Russia’s Foreign Affairs Committee said the explosions in Boston show Russia and US have a “common and omnipresent enemy.”

The blasts are a signal for Russia to tighten security measures as next year the country will be hosting Sochi 2014 Olympics, as well as many other important international events.

As Margelov added, Russia and US should “get united instead of creating dividing lists.”

Investigations are still underway to determine who was behind the explosions, as no organisation has taken responsibility so far.

Muscovites brought flowers to the US Embassy in Moscow to express their condolences.

The president’s offering of assistance in investigating the explosions is largely seen as a meltdown in the relations between Russia and the US that were strained after the Magnitsky list and the adoptions ban.

57 founding members, many of them prominent US allies, will sign into creation the China-led Asian Infrastructure Investment Bank on Monday, the first major global financial instrument independent from the Bretton Woods system.

Representatives of the countries will meet in Beijing on Monday to sign an agreement of the bank, the Chinese Foreign Ministry said on Thursday. All the five BRICS countries are also joining the new infrastructure investment bank.

The agreement on the $100 billion AIIB will then have to be ratified by the parliaments of the founding members, Chinese Foreign Ministry spokesman Lu Kang said at a daily press briefing in Beijing.

The AIIB is also the first major multilateral development bank in a generation that provides an avenue for China to strengthen its presence in the world’s fastest-growing region.